ESRTD2 Electronic Room Thermostat, with LCD Display

Transcription

1 ESRTD2 Electronic Room Thermostat, with LCD Display Version 4.2 ESI Controls Limited User and Installation Instructions

2 INDEX User and Installation Instructions What is a Room Thermostat? What is Chronoproportional Control (TPI)? Technical Data Mounting The Thermostat Dip Switch Settings (Heating) Dip Switch Settings (Cooling) Setting The Temperature Safety Notice Wiring Diagram

3 User and Installation Instructions

4 What is a room thermostat?... An explanation for householders A room thermostat simply switches the heating system on and off based on room temperature. It works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting and switching it off once this set temperature has been reached. Turning a room thermostat to a higher setting will not make the room heat up any faster. How quickly the room heats up depends on the design of the heating system, for example, the size of the boiler and radiators. Neither does the setting affect how quickly the room cools down. Turning a room thermostat to a lower setting will result in the room being controlled at a lower temperature, and saves energy. The heating system will not work if a time switch or programmer has switched it off. The house insulation quality is a key factor in heating control. The way to set and use your room thermostat is to find the lowest temperature setting that you are comfortable with, and then leave it alone to do its job. The best way to do this is to set the room thermostat to a low temperature say 18 C and then turn it up until you are comfortable with the temperature (20 C is the usual preferred set point). You won t have to adjust the thermostat further. Any adjustment above this setting will waste energy and cost you more money. 1

5 If your heating system is a boiler with radiators, there will usually be only one room thermostat to control the whole house. (But building regulations Part L require houses above a certain size to have more than 1 heating zone) Room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the thermostat from working properly. Also keep out of direct sunlight. N.B!! Some thermostats can be used for cooling as well as heating (SPDT). Wiring Diagram NB!! Volt free contacts 2 11

6 Safety Notice N.B!! Because of the possibility of contact between live and neutral connections when fixing thermostat to the back plate it is essential to disconnect the power supply to the back plate before fixing in order to avoid damaging the unit. 10 WARNING! ALWAYS ISOLATE THE AC MAINS SUPPLY BEFORE INSTALLING. THIS PRODUCT MUST BE FITTED BY A COMPETENT PERSON, AND INSTALLATION MUST COMPLY WITH THE GUIDANCE PROVIDED IN THE CURRENT EDITIONS OF BS767 (IEE WIRING REGULATIONS) AND PART P OF THE BUILDING REGULATIONS. What is chronoproportional control (TPI)?... A chrono-proportional (or TPI) room thermostat makes boilers operate more efficiently and provide close accurate control. Chrono-proportional control is a load compensator as it ensures that the boiler on time is reduced to a minimum and matches the boiler heat output with the heat loss. This reduces the net temperature of the return water to the boiler. This is due to the TPI (Time Proportional and Integral) advanced energy saving feature. Rather than just a simple ON/OFF control, like other domestic room thermostats, room thermostats with TPI increases boiler efficiency by firing the boiler at regular intervals, adjusting firing duration with demand, to maintain set room temperatures, giving them a great advantage over other domestic room thermostats and achieving a constant ambient environment for the user: E.G if a property only has a simple mechanical thermostat installed, then the energy saving benefits of a replacement high efficiency condensing boiler will not be realised as the boiler will rarely be running in condensing mode. Heating and hot water can account for over 80% of total household energy usage. Chrono-proportional (TPI) thermostats can provide great cost savings. It can be used on any boiler, with underfloor and radiator systems, zoned heating and electric heating systems. The use of an electronic thermostat with chrono-proportional capability provides closer temperature control plus possible reductions of 10% in both fuel cost and carbon emissions. 3

7 This thermostat has the option of standard setting or TPI. It can also be set up to operate in cooling mode (A/C). Heating Mode Option to switch to 1. Chronoproportional (Chrono) or 6 Cylces (Chrono on, only). 3. Farhenheit or Celsius setting. Cooling Mode Option to switch to 1. Compressor (Comp) delay on or off or 4 mins delay. Comp delay on, only. 3. Farheinheit or Celsius setting. 4 9

8 DIP Switch Settings (Heating) Technical Data DIP Switch Settings (Cooling) SETTING THE TEMPERATURE To set the temperature, turn the dial until the desired temperature is shown in the LCD display. The LCD display will flash the desired temperature for (approximately) 5 seconds before returning to display the current room temperature. WARNING: Interference with sealed parts renders the guarantee void. 8 5

9 Mounting The Thermostat 1. Loosen the screws on the back-plate and remove from the thermostat. 2. Fix the back-plate, terminals at the top, either directly onto a flatwall using wall plugs and screws or on a flush mounting single conduit box. Route the wires through the back of the thermostat and fit the wires to the wall-plate in accordance with the relevant diagram shown overleaf and in accordance with I.E.E. regulations. 3. Install the supplied AA 1.5 Volt batteries into the battery compartment at the rear of the unit. 4. Select personal options by referring to Dip switch menu (See P.8). 5. Fit the thermostat onto back-plate, and tighten the screws. 6. Ensure an appropriate fuse is fitted to the circuit before reconnecting to the mains supply. (3 Amp usually) WARNING: The thermostat must not be fitted or removed from the wall-plate unless the mains supply to the wall-plate has been isolated first. A switch having a contact separation of at least 3mm in all poles must be incorporated in the fixed wiring as a means of fully disconnecting the mains supply m Fix at a height of approximately 1.5 m from the floor, away from draughts or heat sources (including direct sunlight). 7